To produce accurate correlating anatomical reference material, fresh frozen craniospinal cadaver specimens were examined in a computed tomography (CT) scanner and sectioned through on a large-format cryomicrotome in the identical plane. Macrophotography of the surface of the specimen during the course of trimming rendered undistorted sectional--anatomical images showing in great detail the morphological structures of the corresponding CT scan.
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Rauschning et al. (1983) studied this question.